Abs esp module

Is anybody able to tell me if part 4542k6 or 4542k7 is a replacepmet for my
Abs ecu for a 08 1.6hdi c4gp
The only part numbers I can find
Are 87ADE81402686
9665106680
9070508085
All the numbers are on the ecu I can't find a citroen code
Am I able to replace just the way or do I need to replace the whole abs pump assembly as citroen only sell the whole unit for 1450
Cheers for any help